How do economic interdependence and Taiwan's election cycle influence cross-Strait relations? From the theoretical aspect, this question involves the validity of commercial peace theory and the conflict-caused-by-election hypothesis in the case of cross-Strait relations. From an aspect of realpolitik, the trend of economic interdependence and the disturbance of Taiwan's elections are also two significant factors that all policy-makers in Taiwan and China have to consider when making their cost-and-benefit analysis. This paper aims to investigate the political effects of economic interdependence and Taiwan’s election cycle on the interaction between Taiwan and China in the context of time by using the GARCH model. The main finding is that the effects of economic interdependence and Taiwan's election mainly work on influencing the stability, rather negative-orpositive patterns, of Taiwan's and China’s behavior toward each other.